diff options
| -rw-r--r-- | drivers/core/of_extra.c | 12 | ||||
| -rw-r--r-- | include/dm/of_extra.h | 14 |
2 files changed, 26 insertions, 0 deletions
diff --git a/drivers/core/of_extra.c b/drivers/core/of_extra.c index 632a1c2210e..59ce9174ad0 100644 --- a/drivers/core/of_extra.c +++ b/drivers/core/of_extra.c @@ -155,3 +155,15 @@ bool ofnode_phy_is_fixed_link(ofnode eth_node, ofnode *phy_node) return true; } + +bool ofnode_eth_uses_inband_aneg(ofnode eth_node) +{ + bool inband_aneg = false; + const char *managed; + + managed = ofnode_read_string(eth_node, "managed"); + if (managed && !strcmp(managed, "in-band-status")) + inband_aneg = true; + + return inband_aneg; +} diff --git a/include/dm/of_extra.h b/include/dm/of_extra.h index f0d205491c1..c2498aa5859 100644 --- a/include/dm/of_extra.h +++ b/include/dm/of_extra.h @@ -114,4 +114,18 @@ int ofnode_decode_memory_region(ofnode config_node, const char *mem_type, */ bool ofnode_phy_is_fixed_link(ofnode eth_node, ofnode *phy_node); +/** + * ofnode_eth_uses_inband_aneg() - Detect whether MAC should use in-band autoneg + * + * This function detects whether the Ethernet controller should use IEEE 802.3 + * clause 37 in-band autonegotiation for serial protocols such as 1000base-x, + * SGMII, USXGMII, etc. The property is relevant when the Ethernet controller + * is connected to an on-board PHY or an SFP cage, and is not relevant when it + * has a fixed link (in that case, in-band autoneg should not be used). + * + * @param eth_node ofnode belonging to the Ethernet controller + * @return true if in-band autoneg should be used, false otherwise + */ +bool ofnode_eth_uses_inband_aneg(ofnode eth_node); + #endif |